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[SCSI] zfcp: Use status_read_buf_num provided by FCP channel

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The FCP channel provides the number of status read buffers to issue.
Use the provided number instead of the hardcoded number in zfcp.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Christof Schmitt 2010-04-30 18:09:36 +02:00 committed by James Bottomley
parent 6b9e152009
commit 64deb6efdc
5 changed files with 6 additions and 3 deletions
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3
drivers/s390/scsi/zfcp_aux.c
View File

@ -425,7 +425,8 @@ int zfcp_status_read_refill(struct zfcp_adapter *adapter)
{
while (atomic_read(&adapter->stat_miss) > 0)
if (zfcp_fsf_status_read(adapter->qdio)) {
if (atomic_read(&adapter->stat_miss) >= 16) {
if (atomic_read(&adapter->stat_miss) >=
adapter->stat_read_buf_num) {
zfcp_erp_adapter_reopen(adapter, 0, "axsref1",
NULL);
return 1;

1
drivers/s390/scsi/zfcp_def.h
View File

@ -164,6 +164,7 @@ struct zfcp_adapter {
stack abort/command
completion races */
atomic_t stat_miss; /* # missing status reads*/
unsigned int stat_read_buf_num;
struct work_struct stat_work;
atomic_t status; /* status of this adapter */
struct list_head erp_ready_head; /* error recovery for this

2
drivers/s390/scsi/zfcp_erp.c
View File

@ -714,7 +714,7 @@ static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act)
if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED)
return ZFCP_ERP_FAILED;
atomic_set(&act->adapter->stat_miss, 16);
atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num);
if (zfcp_status_read_refill(act->adapter))
return ZFCP_ERP_FAILED;

1
drivers/s390/scsi/zfcp_fsf.c
View File

@ -496,6 +496,7 @@ static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req)
adapter->hydra_version = bottom->adapter_type;
adapter->timer_ticks = bottom->timer_interval;
adapter->stat_read_buf_num = max(bottom->status_read_buf_num, (u16)16);
if (fc_host_permanent_port_name(shost) == -1)
fc_host_permanent_port_name(shost) = fc_host_port_name(shost);

2
drivers/s390/scsi/zfcp_fsf.h
View File

@ -366,7 +366,7 @@ struct fsf_qtcb_bottom_config {
u32 adapter_type;
u8 res0;
u8 peer_d_id[3];
u8 res1[2];
u16 status_read_buf_num;
u16 timer_interval;
u8 res2[9];
u8 s_id[3];